CryptImportPublicKeyInfoEx2 function (wincrypt.h)

The CryptImportPublicKeyInfoEx2 function imports a public key into the CNG asymmetric provider that corresponds to the public key object identifier (OID) and returns a CNG handle to the key.


BOOL CryptImportPublicKeyInfoEx2(
  [in]  DWORD                 dwCertEncodingType,
  [in]  DWORD                 dwFlags,
  [in]  void                  *pvAuxInfo,
  [out] BCRYPT_KEY_HANDLE     *phKey


[in] dwCertEncodingType

The certificate encoding type that was used to encrypt the subject. The message encoding type identifier, contained in the high WORD of this value, is ignored by this function.

This parameter can be the following currently defined certificate encoding type.

Value Meaning
1 (0x1)
Specifies X.509 certificate encoding.

[in] pInfo

The address of a CERT_PUBLIC_KEY_INFO structure that contains the public key information to import into the provider.

[in] dwFlags

A set of flags that modify the behavior of this function. This can be zero or a combination of one or more of the following values.

Value Meaning
Skips public keys in the CRYPT_PUBKEY_ALG_OID_GROUP_ID group that are explicitly flagged with the CRYPT_OID_PUBKEY_ENCRYPT_ONLY_FLAG flag.
Skips public keys in the CRYPT_PUBKEY_ALG_OID_GROUP_ID group that are explicitly flagged with the CRYPT_OID_PUBKEY_SIGN_ONLY_FLAG flag.

These flags are passed in the dwKeyType parameter of the CryptFindOIDInfo function when mapping the public key object identifier to the corresponding CNG public key algorithm identifier.

[in] pvAuxInfo

This parameter is reserved for future use and must be set to NULL.

[out] phKey

The address of a BCRYPT_KEY_HANDLE variable that receives the handle of the imported key.

When this handle is no longer needed, you must release it by calling the BCryptDestroyKey function.

Return value

If the function succeeds, the function returns nonzero (TRUE).

If the function fails, it returns zero (FALSE). For extended error information, call GetLastError. Possible error codes include, but are not limited to, the following.

Return code Description
An import function that can be installed or registered could not be found for the specified dwCertEncodingType and pInfo parameters.
One or more parameters are not valid.


Requirement Value
Minimum supported client Windows Vista [desktop apps | UWP apps]
Minimum supported server Windows Server 2008 [desktop apps | UWP apps]
Target Platform Windows
Header wincrypt.h
Library Crypt32.lib
DLL Crypt32.dll

See also